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EFS Software Easy Chat Server versions 2.0 through 3.1 contain a remote stack-based buffer overflow involving SEH handling in register.ghp. An attacker can trigger the flaw by submitting an overly long username string to the user-registration endpoint, registresult.htm, potentially resulting in arbitrary code execution.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a single Metasploit module (modules/exploits/windows/http/easychatserver_seh.rb) that exploits a buffer overflow vulnerability in the user registration functionality of Easy Chat Server versions 2.0 to 3.1 (CVE-2017-9544). The exploit works by sending a specially crafted HTTP POST request to the /registresult.htm endpoint, overflowing the buffer in the 'UserName' field and overwriting the SEH (Structured Exception Handler). The module allows the attacker to execute arbitrary code on the target Windows system with the privileges of the Easy Chat Server process. The payload is customizable and encoded to avoid bad characters. The exploit is operational and leverages the Metasploit framework, making it easy to use and adapt. The only file in the repository is the exploit module itself, written in Ruby and structured according to Metasploit conventions.
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2 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
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